Machine for facing corrugated paper.



l. N. HAHN.

MACHINE FOR FACING COHRUGATED PAPER.

APPLICATION FILED JUNE 5.1911.

l 9 l 5 l 968 l Patented Aug. 3l, 19%.

2 SHEETS-SHEET i.

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" WWWf/m@ Amy l. N. HAHN.

MACHINE FOR FACING CORRUGATED PAPER.

APPLICATION FILED JUNI: 5.1911.

Patented Aug. 31, 12H5.

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JOHN N. HAHN, 0F CLEVELAND, OHIO.

MACHINE 'FOR FACING CORRUGATED PAPER.

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To all whom it may concern Be it known that zen of the United States, and a resident of the city of Cleveland, county of Cuyahoga, and State of Ohio, have invented certain new and useful Improvements in Machines for Facing Corrugated Paper, of which the 'following is. a specification.

'l/his invention relates to machines for applying facing strip or sheet to crimped or corrugated paper.

It hascome to applied as facings by pasting the same to thecrowns of the corrugations, a board is obtained which is not only comparatively stiff and -strong, but which is exceedingly dried. The process may be continuous or intermittent, and after the facing strip or strips have adhered to the eorrugatedstrip, the web or strip is cut into sheets of a certain length to be subsequently made into boxes or packages, or used in other ways.

Machines for carrying out a continuous corrugating and facing process usually comprise means for carrying the pasted corru-L gated strip with the facing strip applied thereto between plates or rollers or other means for retaining them in close contact with each other until the paste has set or dried. The drying operation is almost always facilitated by the application of heat, the plates or rollers which keep the strips in contact with each other being themselves heated, or the entire drying process being' carried on in a heating chamber.

lt will be apparent that where upper and lower plates are employed to hold the strips in contact with eachother, these plates must be so spaced apart as to create a decided pressure against the paper strips, thus generating no small amount of friction which Specification of Letters Patent.

l, JOHN N. HAHN, a citii be well known that ifav sheet of paper is corrugated and other sheets 'Patented Aug. 3i, 1915.,

Application led .Tune 5, 1911. Serial No. 631,205.

must be overcome in advancing the strips through the machine. Herein isthe most diiiicult problem which confronts the manufacturer of double-faced corrugated paper, that being the apparent necessity of employing friction or feed rollers-or other "frictional conveying means-to advance the strips, the pressure necessarily exerted upon the paper between these rollers, to secure sufficient friction to draw the paper between presser plates of proper length, being sometimes so great as to at least partially crush the corrugations and thus weaken the board. Therefore, a certain amount of heating and drying surface and a certain amount of the desired pressure must be sacrificed, as arule, on account of the'fact that the friction must'fnot be so great but 'what the feed rollers will grip and advance the strips without the application ofa destructive pressure.

It must be taken into consideration that to produce a uniform productvby a continnous7 process, first, the facing strip or strips must be held against the corrugated strip with sufficient pressure to cause contact throughout the entire extent of the crowns of the corrugations to which the paste has been applied; second, that these pasted strips must be advanced subject to such pressure, and, third, that the advancing means must not grip the strips with sufficient force to crush the corrugations. These requirements have necessitated the generation and application of a high degree of heat to hasten the drying operation, in order that the distance through which the strips are drawn under pressure maybe made a minimum and thus reduce friction to the lowest possible point, whereby a gripe ping pressure of lesser degree may be apagainst the advancing pasted strips during the-drying operation; second, the provision of improved means for continuously advancing the strips under such conditions without destructive pressure, whereby a more uniform and perfect product may be produced; third, to effectively combine the pressing and advancing means, thereby not only reducing friction and economizing power, but also materially decreasing the usual excessive length of a machine of this character; fourth, to provide both pressing and advancing means which are automatically self-adjustable to slight variations in the heights of the corrugations, and, fifth, t0 provide a machine which is exceedingly simple in construction and operation, which can be operated at small cost and produce a uniform and high grade product.

My invention wi-l-l ber'more readily understood by reference to the accompanying drawings, forming a part of this Specification, in which- Figure 1 is a side elevation of a complete machine embodying my invention; Fig. 2 is an enlarged rear end View thereof with the cutting mechanism omitted; Fig. 3 is a longitudinal section of a portion o-f the pressing and advancing means, taken substantially on the line 3--3 of. Fig. 2, and Fig. 4C is an enlarged detail view hereinafter described.

Processes of corrugating paper strips and applying Aa facing strip to each side of the corrugated strip, referring now to processes in which the strips are continuously advancing through the machine, are oftwo general kinds; one in which a single machine is designed to corrugate one strip and apply both facing strips thereto, and the other in which a single facing strip is applied to the corrugated strip and this single-faced 'con rugated strip is rolled upon a reel to be subsequently fed into a machine for applying the second facing strip. Each of these processes possesses certain advantages over the other, the former, for instance, being the more rapid and doubtless effecting a certain saving in heat and power, and the latter probably producing a superior product, inasmuch as when the crowns of the corrugations on both sides of the corrugated strip are saturated with the pasting solution at substantially the same time,`the rigidity of the corrugated strip is impaired and it is more difficult to preserve the corrugations in their original form. Furthermore, it will be apparent that when the comparatively green single-faced strip is received from the corrugating and singlefacing machine, in rolling the same upon a reel the paste is given an opportunityv to become thoroughly set and the paper stock perfectly dry, with the roll itself keeping the facing strips under the necessary pressure to preserve substantially uniform contact between the facing strip and the crowns of the corrugations on one side of the corrugated strip. For the above and other reasons, l prefer to corrugate a sheet in any one of the many well known ways and apply a single facing strip thereto, rolling the single-faced strips on a reel, as suggested, and subsequently mounting this roll in position to feed. the strip therefrom into the machine for applying the second facing strip. v

Referring now to the drawings in detail, numeral 11 refers to a roll of a single-faced corrugated paper, as the same has been received from the corrugating and single-facing machine, which roil is preferably mounted upon a spindle 12 carried by the movable frame 13, which is mounted upon rollers or casters 14 in order that the same may be readily transferred from place to place and readily yadjusted in position to direct the strip 15 from said roll through the pasting mechanism, hereinafter described, and into the double-facing machine.

The double-facing machine proper comprises a box or casing 16, suitably supported at a proper height by the legs 17. Upon this box or casing are mounted a plurality of hollow plates 18, the upper faces of which provide a support 'for the moving corru gated strip which is being faced, being, therefore, level and smooth.

2 Journaled in bearingsin the brackets or standards 19 supported upon the rails 20 at the sides of the machine, are a plurality of rollers 21. These rollers are hollow and fiexible, and therein resides one of the most y .hollow rollers are kept filled with air under pressure, in a manner hereinafted described, and the axles 22 are so located with respect to the plates 1S that the major middle portion of the bottom of each roller is flattened to a substantial extent by' the pressure against said plates, as shown (somewhat exaggerated, to better illustrate the invention) in the drawings, whereby a comparatively large area of the material of which the cylindrical portion of the roller is made will contact with the face of one or more of the lplates 18, or with the paper strips therebetween. The dimensions of thel roller being reduced by this distortion, it will be appar ent that the air pressure therein will be increased, and will cause the flattened side of said roller to be firmly pressed against the plate or plates 18. f

Mounted upon a table, stand or suitably Llanes;

supported frame 26, at the front end of the machine, is the paste-pot 27 into which dips the paste-roller 28, rotated in the manner hereinafter described. Immediately above this paste-roller 28, is the idler-roller 29, adapted to bring the crowns of the corrugations of the corrugated strip, passing thereunder, into contact with the paste-roller. The reel or spool 30 of the roll 31 of paper which is to provide the second facing strip, is preferably journaled in bearings in the standards 32, which are so positioned as to deliver the strip from Said roll around the idler roller 33 j ournaled in said frame 26. The single-faced corrugated strip from the roll 11 is directed under the idler roller 29, where a small quantity of paste is delivered to each of the crowns of the corrugations by the l'paste-roller 28. The facing-strip from the roll 31 and the single-faced corrugated strip to which the paste has beenapplied are both carried over the plates 18 and underneath the rollers 21. Each of the axles 22 of the rollers 21 is provided with a sprocket wheel 36, around which passes the chain 37 to rotate said rollers at a uniform velocity. The axle of any one of the rollers 21 may be directly coupled to a source of power, as, for instance, through the pulley 38, and thus drive the chain 37, thereby rotating the other rollers 21 in the same direction and at the same velocity. The axle of the front roller 21, in addition to the sprocket wheel 36, is provided Vwith a sprocket wheel 39, which drives the-pasting roller 29 through the chain 40 which passes around the sprocket wheel 39 and the sprocket wheel 41 on said pasting roller.

Between each pair of the plates 18, I prefer to mount an anti-friction roller 42, which rollers may be idlers or each of which may be provided with a sprocket wheel 43 (one thereof being shown in Fig. 2) whereby said rollersmay be rotated in unison by a chain passing over or around said sprockets. These rollers are intended to reduce the friction between the moving strips and the plates 18, andthe upper ends of said plates adjacent to said rollers are preferably curved, as shown, to make the combined upper surface of said vplates as nearly continuous as pos-` sible.

It will be apparent that the material of which the cylindrical portions of the rollers 21 are made, and the large area of contact surface provided by the flattening of these rollers, will insure aylarge gripping sur-.

face the Vinternal air pressure holding the iattened face ofthe roller in positive and substantially uniform contact with the strips of paper underneath the same. The character of the material and the yielding nature of the pressure are such that the roller will 'grip the strips and upon rotation advance the same under a pressure which, while sufficient to keep the pasted strips in uniform contact with each other and advance said strips, is not sufficient to crush the corrugations, as is so likely to happen when solid rollers are employed, where the area of contact is so small that the pressure must be proportionately increased and is of a substantially unyielding character. It will be found that a comparatively very large area of the upper face of the paper underneath the rollers 2l may be made to contact with the flattened faces of the rollers, and, the plates 18 being smooth and friction still further lessened by provision of the rollers 42, the pasted strips will be advanced over the plates 18 with the application of comparatively but little power, and at the same time the pasted strips will be held in substantially uniform contact with each other during the drying process.

Particular attention is directed to the fact that the stock from which this corrugated paper ismade varies in quality and thickness, on account of which, and for other reasons, the corrugations are not invariably of the same height, even in a single strip or web. On this account, where solid or unyielding rollers, or other rigid advancing means, are employed, not even the most careful adjustment can insure against either unduly crushing the crowns of the higher corrugations or perfect adhesion of the facing strip or strips to the crowns of the lower corrugations. It will be apparent that the yielding character of my flexible roller insures automatic-self-adjustment to corrugations of heights which vary even in a single strip or web, the air pressure within the cylinder insuring substantially uniform compression ofthe facing strip against the pasted crowns of the corrugations in the corrugated strip, irrespective of any slight va-v riations in the heights of the corrugations. In order to facilitate the drying operation, I prefer that-the plates 18 shall-be heated, and also prefer to heat the rollers 21 to a lesser degree by means of hot air. The frame 16 provides a chamber-into which I direct the steam pipe 44, this pipe havingA branches '45 which direct the steam into the interior of the hollow plates 18 to heat said plates. The incasing of these steam pipes within the chamber provided by the frame 16, will heat the air in said chamber, from which the heated air is withdrawn through the pipe 56 by the air-pump 47 and forced 'through the pipe 48 and its branches 49 to the interior of the rollers 21. The axle of each of said rollers at this side of the machine is hollow to permit of the well-known form of connection to direct the air into the interior of Said roller. In this manner, not only may the plates 18 be heated to a comparatively high degree, but the rollers may be heated by the air employedto keep them in an inflated4 condition to stillfurther hasten the drying operation.

When the double-faced corrugated strip is delivered from the rear end of tlie'machine it may be readily severed into sheets of any desired .lengths in any one of many wellknown ways, as by the shearing knives 50 50.

Many modifications of minor details of my improved machine for double facing corrugated paper will doubtless readily suggest themselves to those skilled in the art to which it appertains, and I, therefore, do not desire 'to limit my invention to the specific construction herein shown and described I claim as new and desire toA secure by Letters Patent: y,

1. In a machine of the character described, the combination, with means ,for directing a corrugated stripwith and between plain facing strips into the machine, and

means for applying an adhesive to crowns` `of the corrugations, of a stationary flat support for the advancing strips, and a movable and elastically distortable member cooperating with said support to frictionally advance the superposed strips under pressure therebetween.

2. In a machine of the character described, the combination, with means for di recting a co-rrugated strip with and between plain facingstrips into the machine, andl means for applying an adhesivefto crowns of the corrugations, of a stationary flat support for the advancing strips, and a rotatable and elastically distortable member cooperating with said lsupport to. frictionally advance the superposed strips underpressure therebetween.

3. In a machine of the character described, the combination, with means for directing a corrugated strip with and between plain facing strips into the machine, and means' for applying an adhesive to crowns of the corrugations, of a stationary flat support for the advancing strips, and a rota-n table andelastically disto'rtable member cooperating with said support to frictionally advance the superposed strips under pressure therebetween.

4. In a machine of the character described, the combination, with means for directing a corrugated strip with and between plain facing strips into the machine, and means for applying an adhesive to crowns of the corrugations, of a stationary flat sup- 'port for the advancing strips, and a series of rotatable and elastically distorted mem-A bers cooperating with said support to frictionally advance the super-posed strips under pressure therebetween.

5. In a machine of the character described, the combination, with means for directing a corrugated strip with and between plain facing strips into the machine, and

of the corrugations, of a stationary flat support for the advancing strip's, and a hollow,

portion of said. member and said support,

6. In a` machine of the character described, the combination, with means for directing a corrugated strip with and between plain facing strips into the machine, and means for applying an adhesive to crowns of the'corrugations, of a stationary flat support for the advancing strips, and a series of hollow,` partly flexible and inflated members movable to frictionally advance the superposed strips under pressure between the flexible portions of said members and said support.

7 In a machine of .the character described, the combination, with means for directing a corrugated strip with and between plain facing strips intothe machine, and means for applying an adhesive to crowns of the corrugations, of a stationary flat support for the advancing strips, anda hollow, partly flexible 'and inflated member rotatable to frictionally advance the superposed portion of said member and said support.-

vmeans vfor applying an adhesive to crowns 8. In a machine of the character described,the combination, with means'for-di-- recting a corrugated strip with and between plain facing strips into the machine, and:

means for applying an adhesive to crowns of the corrugations, of a stationary flat support for the advancing strips, and a series of hollow, partly flexible and inflated members ro-tatable to frictionally advance the super-posed strips under pressurebetween' the flexible portions of said members andv said support.

9. In a machine of the character described, the combination, with means for directing a corrugated strip with and between plain facing strips into the machine, and means for applyinglan adhesive to crowns of the corrugations, of a stationary flat support for the advancing strips, and a rotating member presenting a normally cylindrical and elastically yielding contact surface to said support and being flattened by pressure against the superposed strips between said surface and said support, and means for rotating said member.

10. In a machine' of the character de scribed, the combination, with means for directing a corrugated strip with and between plain facing strips into the machine, and means for 'applying an adhesive to crowns of the corrugations, of a stationary flat support for the advancing strips, and a series of rotating members each presenting a normally cylindrical and elastically yielding contact surface to said support and being flattened by pressure against the superposed strips between said surface and said support, and means for rotating Asaid members in unison.

11.1n a machine of the character described, t-he combination, with means for directing a corrugated strip with and between plain facing strips into the machine, and means for applying an adhesive to crowns of the corrugations, of a stationary flat support for the advancing strips, a hollow rotating member presenting a normally cylindrical, flexible and inflated contact surface to said support and being elastically attened by pressure against the superposed strips between said surface and said support, and means for rotating said member.

12. 1n a machine of thecharacter described, the combination, `with means for directing a corrugated strip with and 'between plain facing strips into the machine, and means for applying an adhesive to crowns of the corrugations, of a stationary flat support for the advancing strips, a series of hollow rotating members each presenting a normally cylindrical, flexible and inflated contact surface to said support and being elastically flattened by pressure against the superposed strips between said surface and said support, and means for rotating said members in unison.

13. 1n a machine of the character de scribed, the combination, with a stationary plate, of a hollow presser member having a flexible portion adapted to contact with said plate, means for heating said plate, means for directing a heated fluid to the interior of said member and retaining the same luinder pressure therein, and means for driving said member, for the purpose specified.

14. 1n av machine of the character described, the combination, with a stationary plate, of a member having a normally cylindrical portion of flexible material pressing against said plate and being distorted there by, means for heating said plate, means for directing a heated fluid to the interior of said member and retaining the same under pressure therein, and means for rotating said member.

15. 1n a machine of the character described, the combination, with means fory directing a'corrugated strip with and between plain facing strips into the machine, and means for applying an adhesive to crowns of the corrugations, of a stationary plate, a hollow presser member having a flexible portion adapted to contact with said plate, means for directing a heated fluid to the interior of said member and retaining the same under pressure therein,

' and means for driving said member.

sie

16. 1n a machine of the character de scribed, 'the qcombination, with means for directing a corrugated strip with and be- 'tween plain facing strips into the machine,

and means for applying an adhesive to crowns of the corrugations, of a stationary plate, a member having a normally cylindrical portion of flexible material pressing against said plate, means for directing a heated lluidto the interior of said member and retaining the'same under pressure therein, and means for rotating said member.

17. 1n a machine of the character de` scribed, the combination, with a suitable stationary plate, of a series of hollow presser members, each having a flexible portionadapted to contact with said plate, means -fluid to the interior of each of said mem-l bers and retaining the same under pressure therein, and means for rotatlng said members.

19. 1n al machine of the character described, the combination, with means for directing al corrugated strip with and between plain facing strips into the machine, and lmeans for applying an adhesive to crowns of the corrugations, of a stationary plate, a series of hollow presser members each having a flexible portion adapted to contact with said plate, means for direct` ing a heated .fluid to the interior of each of said members and retaining the same under pressure therein, and means for driving said members.

` 20. In a machine of the character described, the combination, with means for directing a corrugated strip with and between plain facing strips into the machine, and means for applying an adhesive to crowns of the corrugations, of a stationary plate. a

series of members each having a normally vcylindrical portion of flexibleV material pressing against said plate and being flatmembers, each anti-friction roller being located immediately below one of said' rotat' ing members.

2Q. In a machine of the character described, -the combination, with means for .directing a corrugated strip with and between plain facing strips into the machine, and means for applying an adhesive to crowns of the corrugations, of a series of each having a. normally cylindrical and elasticall'y yielding portion pressing against said support and being flattened thereby, and means for rotating said members, each of said anti-friction rollers being located im- Lnediately below one of said rotating memers. v

'23. In a machine of the character described, the combination, with means for directing a corrugated strip with and between plain facing strips into the machine, and means for applying an adhesive to crowns of the corrugations, of a series of stationary plates with anti-friction rollers therebetween to provide a` substantially continuous flat support, a series of hollow members each having a normally cylindrical por` tion of flexible material pressing against said support and being distorted thereby, means for inflating said members and re taining the same in an inflated condition, and means for rotating said members in unison, each of said anti-friction rollers being located immediately below one of said rotating mem/bers.

24. In a machine of the character described, the combination, with a series of I' stationary plates and anti-friction rollersv therebetween to form a substantially con` tinuous support, of a series of hollow members each having a normally cylindrical portion ofl flexible material pressing against said support andbeing distorted thereby,

means for heating said plates, means for directing a heated fluid to the vinterior of each of said members and retaining the same under pressure therein, and means for rotating said members.

In testimony of the foregoing, I have hereunto set my hand in the presence of two witnesses.

JOHN N. HAHN.

Witnesses:

WM. F. RAPPRICH, E. C; LANG. 

